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SUMMARY:Diamond Quantum Photonics and Optomechanics - Marko Loncar (Harvar
 d)
DTSTART:20160222T153000Z
DTEND:20160222T170000Z
UID:TALK63495@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Diamond possesses remarkable physical and chemical properties\
 , and in many ways is the ultimate engineering material. For example\, it 
 is transparent from the ultra-violet to infrared\, has a high refractive i
 ndex (n = 2.4)\, strong optical nonlinearity (Kerr and Raman) and a wide v
 ariety of light-emitting defects. These properties make diamond a highly d
 esirable material for many applications\, including those in quantum and n
 onlinear photonics\, high power optics and optomechanics.\nIn my talk\, I 
 will review advances in nanotechnology that have enabled fabrication of na
 noscale optical devices and chip-scale systems in diamond. One example is 
 diamond-on-insulator platform that enables realization of ultra-high quali
 ty factor optical cavities (Q>1e6) [1\,2]. Using these devices\, microreso
 nator based frequency combs [2] and Raman lasers have been demonstrated [3
 ]. Another important application of diamond is in the field of quantum inf
 ormation science and technology. At the heart of these applications are di
 amond’s luminescent defects—color centers—and the nitrogen-vacancy (
 NV) and silicon-vacancy (SiV) color center in particular. These atomic sys
 tems in the solid-state possesses all the essential elements for quantum t
 echnology\, including storage\, logic\, and communication of quantum infor
 mation. I will summarize our work on high-Q and small mode volume photonic
  crystal nanobeam cavities fabricated in bulk diamond substrates using nov
 el angled-etching technique [4\,5]. Recent efforts aimed at coupling of th
 ese devices to NV and SiV color centers will be presented [6\,7]. Finally\
 , our efforts towards achieving strong spin-strain interaction between col
 or centers embedded inside diamond NEMS [8\,9] and optomechanical crystals
  [10] will be reviewed.  \n\n[1]	B. J. M. Hausmann\, et al\, "Integrated d
 iamond networks for quantum nanophotonics"\, Nano Letters\, 12\, 1578 (201
 2)\n[2]	B. J. M. Hausmann et al\, "Diamond nonlinear photonics"\, Nature P
 hotonics\, 8\, 369 (2014)\n[3]	P. Latawiec et al\, “On-Chip diamond Rama
 n laser” Optica\, 2\, 924 (2015)\n[4]	M. J. Burek\, et al\, “Free-stan
 ding mechanical and photonic nanostructures in single-crystal diamond”\,
  Nano Lett.\, 12\, 6084 (2012)\n[5]	M. J. Burek\, et al\, “High-Q optica
 l nanocavities in bulk single-crystal diamond”\, Nat. Comm.\, 5\, 5718 (
 2014)\n[6]	B. J. M. Hausmann\, et al\, “Coupling of NV centers to photon
 ic crystal nanobeams in diamond”\, Nano letters\, 13\, 5791-5796 (2013)\
 n[7]	A. Sipahigil et al\, “Quantum optical switch controlled by a color 
 center in a diamond nanocavity”\, under review (2016)\n[8]	Y. I. Sohn et
  al\, “Dynamic actuation of single-crystal diamond nanobeams"\, Appl. Ph
 ys. Lett. 107\, 243106 (2015)\n[9]	S. Meesala et al\, “Enhanced strain c
 oupling of nitrogen vacancy spins to nanoscale diamond cantilevers”\, ar
 Xiv: 1511.01548\n[10]	M. J. Burek et al\, “ Diamond optomechanical cryst
 als”\, arXiv: 1512.04166\n
LOCATION:Ryle Seminar (Rutherford 930)
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